hello Ranga, what method and setting do you have selected for graphics init? 400x300 would indicate that coreboot is initializing the display in VGA text mode, rather than a VESA framebuffer mode - you likely need to change this in Kconfig. The Tianocore coreboot framebuffer GOP driver can only reuse whatever framebuffer coreboot has set up, so there will only ever be one option available. Assuming you are running a VGA Option ROM, you're going to be limited to VGA text mode or 640x480, 800x600, 1024x768, or 1280x1024 (at various bit depths). 1600x900 isn't going to be available, I don't believe.
cheers, Matt On Thu, Jan 3, 2019 at 2:25 AM galla rao <[email protected]> wrote: > > Video Mode in Coreboot > > CorebootLog > coreboot video frame buffer information > physical_address: 0xC0000000 > x_resolution: 0x400 > y_resolution: 0x300 > bits_per_pixel: 0x20 > bytes_per_line: 0x1000 > red_mask_size: 0x8 > red_mask_pos: 0x10 > > GOP UEFI driver (Tiano payload) is expected to report 4 modes > GOP should report MaxMode 4 *0: > 1600x900 BGRReserved Pixels 1600 1: > 640x480 BGRReserved Pixels 640 2: > 800x600 BGRReserved Pixels 800 3: > 1024x768 BGRReserved Pixels 1024 > > In BayTrail Platform i only see 1 single mode which is 400 * 300 > > what changes are expected from GOP/VBIOS to set one of the 4 graphics mode > Please advise! > > Best Regards > Ranga > _______________________________________________ > coreboot mailing list -- [email protected] > To unsubscribe send an email to [email protected] _______________________________________________ coreboot mailing list -- [email protected] To unsubscribe send an email to [email protected]
